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Professional-grade John Frieda 4-in-1 Extra Strong Serum from the Frizz Ease Series, specifically formulated for thick and unruly hair in a 50ml size Advanced formula combines multiple benefits: frizz control, humidity protection, heat defense, and intense smoothing action Designed with powerful smoothing oils that seal the hair cuticle, providing up to 72 hours of frizz control and humidity resistance Particularly effective for thick, difficult-to-manage hair types while remaining safe for color-treated and natural hair